Oyonnax is the second most populated commune in the Ain department in the Auvergne-Rhône-Alpes region in eastern France. Oyonnax lies in a valley of the Jura Mountains in the far north of Ain. It is near the Parc naturel régional du Haut-Jura. The city is on the river Ange.
Country: France
Region: Auvergne-Rhône-Alpes
Area: 35.99 km² (13.90 sq mi)
Elevation: 440–1,082 m (1,444–3,550 ft) · (avg. 540 m or 1,770 ft)